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  <title>Reads an image for later placement</title>
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  <div id="layout-content"><div id="function.ps-open-image" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ps_open_image</h1>
  <p class="verinfo">(PECL ps &gt;= 1.1.0)</p><p class="refpurpose"><span class="refname">ps_open_image</span> &mdash; <span class="dc-title">Reads an image for later placement</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.ps-open-image-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>ps_open_image</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$psdoc</code></span>
   , <span class="methodparam"><span class="type">string</span> <code class="parameter">$type</code></span>
   , <span class="methodparam"><span class="type">string</span> <code class="parameter">$source</code></span>
   , <span class="methodparam"><span class="type">string</span> <code class="parameter">$data</code></span>
   , <span class="methodparam"><span class="type">int</span> <code class="parameter">$lenght</code></span>
   , <span class="methodparam"><span class="type">int</span> <code class="parameter">$width</code></span>
   , <span class="methodparam"><span class="type">int</span> <code class="parameter">$height</code></span>
   , <span class="methodparam"><span class="type">int</span> <code class="parameter">$components</code></span>
   , <span class="methodparam"><span class="type">int</span> <code class="parameter">$bpc</code></span>
   , <span class="methodparam"><span class="type">string</span> <code class="parameter">$params</code></span>
   ) : <span class="type">int</span></div>

   <p class="para rdfs-comment">
    Reads an image which is already available in memory. The parameter
    <code class="parameter">source</code> is currently not evaluated and assumed to be
    <em>memory</em>. The image data is a sequence of pixels starting
    in th upper left corner and ending in the lower right corner. Each pixel
    consists of <code class="parameter">components</code> color components, and each
    component has <code class="parameter">bpc</code> bits.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.ps-open-image-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">psdoc</code></dt>

     <dd>

      <p class="para">
       Resource identifier of the postscript file
       as returned by <span class="function"><a href="ps_new.html" class="function">ps_new()</a></span>.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">type</code></dt>

     <dd>

      <p class="para">
       The type of the image. Possible values are <em>png</em>,
       <em>jpeg</em>, or <em>eps</em>.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">source</code></dt>

     <dd>

      <p class="para">
       Not used.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">data</code></dt>

     <dd>

      <p class="para">
       The image data.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">length</code></dt>

     <dd>

      <p class="para">
       The length of the image data.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">width</code></dt>

     <dd>

      <p class="para">
       The width of the image.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">height</code></dt>

     <dd>

      <p class="para">
       The height of the image.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">components</code></dt>

     <dd>

      <p class="para">
       The number of components for each pixel. This can be
       1 (gray scale images), 3 (rgb images), or 4 (cmyk, rgba images).
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">bpc</code></dt>

     <dd>

      <p class="para">
       Number of bits per component (quite often 8).
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">params</code></dt>

     <dd>

      <p class="para">
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.ps-open-image-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns identifier of image or zero in case of an error. The identifier is
   a positive number greater than 0.
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.ps-open-image-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="ps_open_image_file.html" class="function" rel="rdfs-seeAlso">ps_open_image_file()</a> - Opens image from file</span></li>
    <li class="member"><span class="function"><a href="ps_place_image.html" class="function" rel="rdfs-seeAlso">ps_place_image()</a> - Places image on the page</span></li>
    <li class="member"><span class="function"><a href="ps_close_image.html" class="function" rel="rdfs-seeAlso">ps_close_image()</a> - Closes image and frees memory</span></li>
   </ul>
  </p>
 </div>

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